part ofregional part of brainolfactory trigoneA small triangular area in front of the anterior perforated substance. Its apex, directed forward, occupies the posterior part of the olfactory sulcus, and is brought into view by throwing back the olfactory tract (adapted from Wikipedia)BAMS:OTrBAMS:oltFMA:74883NCIT:C33813OLTUBERON:0002922UMLS:C0228279http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=34trigonum olfactoriumtrigonum olfactoriumuberonolfactory lobestructure with developmental contribution from neural crest